Advance file photoAliyah Austin, 16, allegedly took the 3-year-old daughter of a male acquaintance on the Staten Island Ferry to a friend's Brooklyn home.

STATEN ISLAND, N.Y. -- Fuming from a Valentine’s Day spat over a microwave snack, a teen allegedly kidnapped a 3-year-old girl the next night from a male acquaintance’s Mariners Harbor home, said a law enforcement source.

But cops turned Aliyah Austin’s subsequent texted rants to the girl’s father against her and nabbed the 16-year-old suspect yesterday in Brooklyn’s Bedford-Stuyvesant section. The girl was unharmed.

The source said Ms. Austin, a transient, had been living at the home of the victim and her of 29-year-old father for a few days. The suspect had been watching the little girl while her dad went to work.

The source could not immediately say how Ms. Austin met the victim’s father. He declined to divulge the man’s name.